It's a matter of elegantly reducing how much one cares about judgement and disapproval. After talking to some people, there are different strokes for different folks.

I took up knitting. By using my old approach, I never got anything done because the mistakes meant I had to start over again (before I learnt to fix mistakes). And I had to accept the mistakes to get the scarf, or whatever, completed. And I realized that by analyzing my mistakes (thy is this twisted this way? How did I knit these together? Why are there now four fewer stitches in this row? Where did these three extra stitches come from!?) things got much better for me.

One exercise my first teacher made me to to help me chill was to make large circular movements with my bow arm, ridiculously large, counter-clockwise, and play a string as the bow passed the instrument. After that, everything else I did was nicer, etc. in comparison.